Now would be the last time this season that it would happen without doing harm to the landscape, as many more plants are on the verge of blossoming. Rain thereafter would wash away the pollen. I'd have mixed feelings about that. On the one hand, no sneezing or watery eyes, but on the other, a florally challenged spring. Given a choice, I'll endure the allergies to secure an abundance of flowers.
Rain this week probably won't lead to dire consequences, and as the very wet storms are expected to bring more snow to the mountains they will be of benefit for the rest of the year. Here, the timing may be perfect to water all those plants and trees that are on the verge of blooming. They can store up their energy and burst forth later in March. This could turn out to be the best spring we've had in years. If so, then getting soaked when I go shopping this week will have been well worth it.